Perforating



De@ 25 l923 39478944@ E. T. LEVEQUE y PERFORMING Filed March 15, 1920 2 Sheeizs-Sheet l Patented De@ 25, v lil@ Ldldpldl UNTTE@ PATENT @FFTCC- BERNARD T.' LEVEGIE, @El WENHM, MihSClEIUSTTTS, ASSTGNOR TQ)- UNETED @HQE MACHINERY @@RPORATTGN, @F IPATERSN, NEWT JERJSTH, A CRPRATIN' @F NEW JERSEY.

Application tiled March i5, i920. Serial tto. Statici.

To all whom t may concernf Be it known that l, BERNARD lll Levantar, a citizen of the United States, residing at Wenham, inthe county ot Essex and State oit Massachusetts, have invented certain llmprovements in Pertorating, of which the iollowing description, in connection with the accompanying drawings, is. a specification, like reference characters `ion the drawings indicating like parts in the several figures rThis invention relates tlthe cutting ot stoclr, and for purposes of illustration is described in connection with the perforation of sheet material such as that used inthe manufacture ot shoes. x

ln performing such periorating' operations 1t is usual to operate a hollow die either against a suitable punch block or against a backing strip of paper. llt the former is used, the punch block must he frequently retaced or replaced, and the die renewed, otherwise the periorations will not be cleancut, and a machine sa operating is noisy and cannot be run at high speeds owing to excessive damage to the punch or punch block or both. With a backing strip of paper, on the other hand, very satisfactory pertorating may be done, .frequent replacement ozt the punch is not necessary, and the machine may be run at a higher speed, but the continuous consumption of paper constitutes a never ending expense inherent in this method ot periorating, and one p which it is desirable to eliminate.

llt is an object of the present invention, accordingly, to provide for the satisfactory and high grade perforation oi stock without the necessit of frequent renewals or repairs of the punc or punch block and without the use of a backing strip of paper. rThis niy invention accomplishes by the use ot a cutting element or a pair oi cutting elements operated to make a ring-like incision part way through the stoclr, the severing heing completed in any suitable manner as by a current 'ot air. ln the illustrated embodiment ci the invention the pertorating is done by means or a pair or cri-operating hol low dies arranged for relative reciprocation to cut the stoclr `trom Tooth sides, the relative movement heing so controlled that upon their approach the two dies do not quite come together, duid pressure heing thereupon exerted to supply a tearing 'orce to push out trom the ctoclr the pill partially termed by the dies. This pressure may be intron duced through one ot the hollow dies and will be applied entirely to the surface of the pill which lies inside the incision, the pill being forced outthrough the other die..A A machine so constructed is almost noiseless in operation and is capable of operation at ex. tremely high speedo Y llt may be noted here that thev illustrated machine is shown tor purposes .of exemplitication only, since it is obvious that my invention in its method aspects is not limited thereto and in its machine aspects is capable of other embodiments.

With these and other objects'and features in view, the invention will now be described in connection with the accompanying drawn ings and pointed out in the claims.,

Fig.. l is a side elevation and lFig. 2 a -ront elevation of a perforating machine in connection with which the invention will be described;

Fig. 3 is a detail cross-sectional view through the dies and duid pressure cylinder of the machine of Figs. l and 2; and

F ig. l is a dia ammatic sectional View illustrating the re ation of the' dies to one another and to the lstoclr at the conclusion ofthe periorating operation and before the commencement of the separation oit the dies.

The illustrated machine is provided with a base l() from which extends a standard 12 rovided with a bearing lli for the drive shaft i6, the latter being rotated trom any suitable source of power as through a pulley 18 and belt 20. Supported by the standard l2 is a guideway 22 in which is mounted for reciprocating movement a iiuid pressure cylinder 2t provided with a piston 26 and carrying at its lower end ahollow punch or die 28. Suitabl and preferably adjustably mounted on ase 10 is a second hollow punch or die 30 in co-operative relation to the diev 28.,

'lo reciprocate the cylinder 2d and die 28 so as to bring the two dies into co-operativc relation, there is mounted upon the drive shaft lo a cam a() contacting with a pair ot opposed bearing surfaces l2 and ld oli a re ciprocable member t6 connected at one end to the cylinder 2l and having a sliding bearing at the other end at 48, whereby rotation of the cam itl in the direction of the arrow in Fig. 2 will move the punch 28 into and out of co-operative relation to the punch dit,

its

l crate The movent of the punch 28 is so regulated that the two dies never come quite into contact, they being so set as to come within will be in to cut the stock sooner than the` latter t e idea being to compress somewhat the pill and to exert a downward pressure on it b the upper die. The pill thus partiall ormed is then forced from the stock by uid pressure produced by the descent of the piston 26.

ln the illustrated machine the cam is provided with a crank pin which is received by a bearing carried bythe piston rod 52, the latter preferabl being adjustable as to its len h so that t e pressure may be varied to suit diderent conditions of operation. The form and position of the cam 40 andits relation to the crank pin 50 are such that there is little compression of the air in the cylinderat the start of the cut but at the icompletion of the cut the pressure of the air 1n the c linder is at a maximum so that when the die 28 reaches its lowest position the pill will be forced from the stock and out through the die 30 by the pressure of the air in the cylinder.

Where in this specification the terms upper or lower die or punch occur, it is to 't understood that these terms are used for purposes of convenience in referring to the accompanying drawings and that so far as various aspects of the invention are concerned it is entirely immaterial which die is above and which is below or indeed whether either is abovev the other, the relative position of the two being the thing that it is intended to emphasize.

Having described my invention, what l claim as new and desire to secure by Letters Patent-of the United States is:

l. That improvementin perforatin which consists in partially severing a pil from a piece of stock by making a'ring-like incision and' completing the severing from the stock of the pill thus partially formed by a force applie to the surface of the pill inside said incision.

2. That improvement in perforating which consists in partially severing a pill from a piece of stock and completing the severing of the pill thus partially formed by blowing it from the stoc 3. That improvement in perforating which consists 1n ppsitioning a piece of stock to be perforated etween a pair of hollow dies, relatively movingsaid dies so as to cut into the stock from both sides without complete] severing the pill thus formed, vand to be perforated between a Y. intrecci l sure exerted through the opening in one oit' the hollow dies.

4. rlhat improvement in perforating which consists in supporting a piece of stock around an opening, cutting into the stock in a closed path nearly as liar` as'the outline of the o enmg, and completin the separation of t e partially formed pi l by blowing it from the stock and through the opening.

5. That improvement in perforating whichconsists in cutting a piece of stock so as almost to sever a pill therefrom, and completing the severing of the pill from the stock by Huid pressure.

6. That improvement in perforating which consists in partially severing as pill from a piece of stock with a hollow tool and completmg the severing from the stock or the pill thus partially formed by fluid pressure exerted through the opening in the hollow tool. v

7. rlhat improvement in,l perforatinv l which consists in positioning a piece of stoc to be perforated between a air of hollow dies, relatively moving said ies in a direction to perforate the stock, and passing a fluid current through the opening in one of the dies to force out thevpill throughthe other die.

8. That improvementin -perforating which consists in positioning a pieceof stock to be perforated between a pair of hollow dies, relatively moving said dies so as almost to sever a pill fromthe stock,'and completin the severing of the ill from the stock y fluid pressure exerte through the opening in one of the hollow dies.

9. That improvement in perforating which consists in positioning a piece of stock pair of hollow dies, relatively moving said dies so as to cut into the stock from both sides and forcing the pill thus formed from the stock through the opening in one of the dies by fluid pressure exerted through the other die.

10. In a perforating-machine, the combination of means 'partially to sever' a pill from a piece of stock by making a ring-like incision, and means constructed and arranged to apply a tearing force wholly within the incision to the surface of the p1ll thus partially formed to push it out of the piece of stock.

11. In a vperforating machine, the combination of a hollow punch, means relatively to move .said punch and a piece of stock to be perforated to cause the punch to cut part way through the stock, and means acting through the opening in said hollow punch to sever completely the pill thus partially formed from the stock.

12. In a perforating machine, the combination ora pair of hollow dies, means for moving one of the dies towards the other to penetrate, without severing, a piece of stock,

' therebetween without and a fluid pump communicating with one or said dies for tearing the partly severed pill from the rest of the stock.

1?. ln a pertorating machine, the combination or a hollow punch, means relatively to move said punch and a piece ci stock to be perforated to cause the punch to cut the stock, and a source oiE Huid pressure in conimunication with said punch to force the pill cut by the punch from the stock.

14. ln a pertorating machine, the combination of a pair oi" co-operating dies, means arranged relatively to reciprocate said dies so as to cut into a piece of stock supported bringing the dies of the pair into contact, and means for moving a iuid current through the dies to sever completely the part of the stock between the dies.

15. ln a perforating machine, the combination of a pair of co-operating dies of' equal area, means arranged relatively to reciprocate said dies so as to cut from both si es into a piece of stock held therebetween *f* without bringing the dies of the pair into contact, and fluid means for severing the partially cut pill from the stock.

16. ln a perforating machine, the combination of a pair of hollow dies, means arranged relatively to reciprocate said dies so as to cut nearly through a piece of stock held therebetween, and means to apply fluid pressure to the stock through the opening in one of the dies to force the pill out through the other die.

17. ln a perforating machine, the combination of a luid pressure cylinder, a hollow die carried by said cylinder and in communication with the interior thereof, and a piston in co-operative relation to said cylinder.

18. ln a perforating machine, the combination of a luid pressure cylinder, a hollow die carried by said cylinder and in communication with the interior thereof, a piston in co-operative relation to said cylinder, means to reciprocate said die and cylinder to erforate a piece of stock, and means to reciprocate said piston in timed relation to the reciprocation of said die and cylinder to orce from thev stock the pills cut by said 19. lln a pericorating machine, the combination of a pair of hollow dies, means relatively to reciprocate said dies to out a piece of stock held therebetween, and means to apply fluid pressure through the opening in one of the dies to force the pills cut by the dies out through the other die.

20. ln a perforating machine, the combination of a pair of co-operating hollow dies, one of said dies having a cutting edge formed at a more acute angle than that of the other, and means relatively to reciprocate said dies.

21. lln a perforating machine, the combimeans relatively to reciprocate said dies to bring their cutting edges nearly but not t quite into contact whereby the die having its cutting edge formed at the more acute angle will rst begin to cut stock positioned between them and the die having its edge formed at the less acute angle will later bcgin to cut the stock and will compress the pill thereby formed and tend to force it throu h the other die.

22. an a pertorating machine, the combination of a pair of hollow dies, one oi said dies having a cutting edge formed at a more acute angle than that of the other, means relatively to reciprocate saiddies partially to perforate stock positioned between them, and means to force from the stock the pills thus vpartially formed.

28. ln a perforating machine, the combination of a pair of hollow dies, one of said dies having a cutting edge formed at a more acute angle than that of the other, and a source of fluid pressure in communication with the die having its cutting edge formedat the less acute angle to torce the pills cut by the dies out through the die having its cuttin edge formed at the more acute angle.

242. n a perforating machine, the combination of a source or' Huid pressure having as elements thereof a cylinder andpiston, a hollow punch carried by one of said elements and having communication with the interior of the cylinder, means relatively to reciprocate stock to be perforated and the punch to cut the stock, and means to reciprocate the other said element in timed relation to said first named reciprocation to force from the stock the pill cut by said punch.

25. lin a perforating machine, the combination of a pair of co-operating hollow dies, a fluid pressure cylinder carrying one of said dies in communication with the interior thereof, means relatively to reciprocate said dies to perforate stock held therebetween, a piston in (3o-operativeI relation to said cylinder, and means to reciprocate said piston in timed relation to the relative reciprocation of said dies to force from the stock the pills cut by the dies.

26. lln a perforating machine, the combination of a hollow die, a member co-operating therewith to perorate stock by the relative reciprocation of said die and said member, said member having a hole therein in opposed relation to said die and a source of fluid pressure in communication with said hole.

27'.V ln a perforating machine, the combination of a hollow die, a member co-operating therewith to perforate stock by the relative reciprocation of said die and Said member, said member having a hole therein in' opposed relation to said die, and a Huid pressure c linder and piston in communication Wit said hole to force the pill cut from the stock out through said die.

28. ln a perforating machine,'thecombi nation of a fluid pressure cylinder, a perforating element carried thereby and having a hole 1n communication with the interior of the cylinder, a piston in (zo-operative rele` Lemmi tion to said cylinder, a cem for reciprocatmg' said eylinder, and a crank for reci ro-y cating sald piston in timed relation tothe reciprocation of said cylinder to force from the stock the pills cut by the reciprocation of said perfor-:itin element. l

In testimony w ereof I have signed lily name to this s ecication.

ln RNARD fr. LEVEQUE 

